98 PRODIGIT
5.3.2. Dynamic mode:
The built-in pulse generators allow the user to recreate real world loads that vary with
Time
Major application areas for dynamic operation in CC mode include:
• Power supply load transient response testing
• Power recovery time testing
• Battery Pulse load simulation
• Power component testing
• Two levels of current can be set and the rate of change between the 2 current
levels can be adjusted in relation to time. The current rise (slew) rate and the
current fall (slew) rate can be adjusted independently from each other and are
further defined below
• Rise slew rate = | Ilow - Ihigh | / Ta ( A/us )
• Fall slew rate = ( Ihigh - Ilow ) / Tb ( A/us )
• Rise time (Ta) = ( Ilow - Ihigh ) / Rise slew rate
• Fall time (Tb) = ( Ihigh - Ilow ) / Fall slew rate
• Please see Fig 1-12 for more information on slew rates.
• The time the waveform is high (Thigh) and the time the waveform is low (Tlow)
can Also be adjusted. The diagram below shows the 6 adjustable parameters
that define the dynamic waveform.
5.3.3. Analogue programming input
The analogue programming input can also be used in CC mode. The analogue
Programming input allows a complex dynamic waveform to be set up on an external
Oscillator. The 3350F series load module will track and load according to the external
Signal as long as it is within its dynamic capability. The input signal can be the range of
0-10V (dc+ac). The 10V is proportional to the full current capability of the load module.
More information on the analogue programming input can be seen in section 3.2.
Fig 5-4 Dynamic load current with independent programmed Rise/Fall slew rate
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